The formal [3+3] cyclization of 1,3-bis(silyloxy)buta-1,3-dienes with 1-aryl-3-ethoxyprop-2-en-1-ones, available by Heck reaction of benzoyl chlorides with ethyl vinyl ether, afforded a variety of 6-arylsalicylates. The reaction of the products with concentrated sulfuric acid resulted in the formation of fluorenones. 6-Alkylsalicylates were prepared by cyclization of 1,3-bis(silyloxy)buta-1,3-dienes
Anticancer agent synthesis designed by artificial intelligence: Pd(OAc)2-catalyzed one-pot preparation of biphenyls and its application to a concise synthesis of various diazofluorenes
作者:Tetsuhiko Takabatake、Hiroki Tomita、Syo Okada、Natsumi Hayashi、Takashi Masuko、Masahiro Toyota
DOI:10.1016/j.tetlet.2020.152267
日期:2020.9
9-diazo-1-methoxy-9H-fluorene, which inhibits the proliferation of HeLa cells, was achieved in reasonable chemical yield. In addition, various diazofluorenes were synthesized using the above protocol and their antitumor effects were evaluated. As a result, several novel diazofluorenes, which have a stronger cytotoxic activity than cisplatin against various human epithelial cancer cells, were found.